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    This did not work on my machine (Arch Linux), but mik's answer did. Commented Apr 21, 2017 at 8:14
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    There are two common rename utilities but neither of them are developed by GNU: Debian-based distributions include a rename utility with their Perl package while Red Hat-based distributions use the rename utility from the util-linux from the Linux Kernel Organization. Your link is to the rename C function from the GNU standard library. Commented Jul 7, 2017 at 9:16
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    In this answer, why do we have to write /g in rename 's/#U00a9/safe/g' * Commented Jul 9, 2018 at 21:25
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    waiting for the reason for /g as @Nikhil pointed Commented Nov 5, 2019 at 18:24
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    /g means global search, i.e. once it finds and replaces an instance of the string, it will keep searching the filename for more instances. So foo_foo.jpg would become bar_bar.jpg. If you didn't put the g, foo_foo.jpg would become bar_foo.jpg instead (only the first instance of 'foo' would change) Commented Feb 26, 2020 at 15:31